Furnace-grate.



T. M. KEKIOH.

FURNACE GRATE. APPLICATION FILED JUNE 28, 1913.

Patented Mar. 9, 1915.

2 SHEETS-SHEET l.

waesses fy%wm THE NORRIS FEIERS (2., PHOTO-LITHO.. WASHINGTON. D. C,

T. M. KEKIGH.

FURNACE GRATE.

APPLICATION FILED mums, 1913.

1,131,524. Patented Mar. 9, 1915.

2 SHEETS-SHEET 2.

THOMAS M. KEKICH, OF CHICAGO, ILLINOIS.

FURNACE-GRATE.

Specification of Letters Patent.

Patented Mar. 9, 1915.

Application filed June 28, 1913. Serial No. 776,391.

To all whom it may concern:

Be it known that I, THOMAS M. KEKIOH, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in F urnace-Grates, of which the following is a specification.

The present invention relates to improvements in grates for furnaces and more especially to those of the type used for smelting furnaces, and the primary object of the invention is to provide an improved grate whereby economy in fuel consumption is efi'ected, higher etliciency in the generation of heat is obtained, overheating of the grate bars is avoided, and dropping of the coal or fuel between the grate bars is prevented.

To these and other ends, the invention consists in certain improvements, and combinations and arrangements of parts, all as will be hereinafter more fully described, the novel features being pointed out particularly in the claims at the end of the specification.

In the accompanying drawings :Figure 1 is a front elevation of a furnace provided with a grate constructed in accordance with the present invention; Fig. 2 represents a vertical section through the furnace shown in Fig. 1; Fig. 3 is a perspective view of a portion of one of the grate bars and supports; Fig. 4: is a detail view, partly in section, showing a portion of the grate and the adjacent support.

Similar parts are designated by the same reference characters in the several views.

Grates embodying the present invention are applicable generally to furnaces of different kinds, although they are especially adapted for use with smelting furnaces. The invention is so shown in the present in stance but it will be understood that the uses to which the invention may be put are not limited and also that the invention is not limited to the exact construction shown, as equivalent constructions may be used and will be included within the claims at the end of the specification.

In the construction shown, 1 designates a furnace of the type used in connection with the smelting of ores, this furnace having a bridge wall 2 and a front wall 3. The grate is arranged at the bottom of the fire-box and preferably extends diagonally or in an inclined direction from the front wall 3 toward the bridge wall 2. In the construction shown, a pair of grate bar supports a and 5 are shown, these being mounted at the inner sides of the side walls 6 and 7 of the furnace, and these grate bar supports are provided at their inner sides with series of ledges 8 and 9 which are spaced atsuitable distances vertically and extend horizontally, these ledges being spaced diagonally and are of a number corresponding to the number of grate bars to be used. The grate bars 10 extend horizontally between the supports l and 5 and the ends of the grate bars rest on the respective ledges 8 and 9. The grate bars consequently are spaced in a diagonal direction and the bottom of the fire-box or the fuel space of the furnace is of a triangular form. Each grate bar has a down wardly sloping inner surface 11 and a series of air-feeding holes 12 extend through each bar from the bottom to the top thereof. Each grate bar is held in place to avoid sliding thereof by suitable means such, for example, as the keys or pins 13 and 14 which extend through the forward ends of the respective ledges 8 and 9. The sloping sur faces 11 at the inner end of the grate bars are so related that the inner edge of each bar overlies the next lower grate bar, these inner edges of the grate bars in the construction shown occupying positions directly above the downwardly and forwardly sloping surfaces 11.

In practice, the fuel is fed to the fire-box and the burning fuel occupies the triangular space in the bottom thereof between the grate and the bridge wall. The fuel rests on the rearwardly sloping surfaces at the inner ends of the grate bars and as these bars overlap one another the fuel is 'prevented from dropping between the bars. More perfect combustion of the fuel is also obtained owing to the feeding of air thereto through the air-feeding holes in the inner ends of the grate bars as well as through the spaces between the grate bars, this resulting in higher efficiency in the generation of heat. The horizontal spaces between the grate bars also enable a rod to be inserted between the bars for the purpose of removing clinkers, thus facilitating cleaning of the fire, and the overlapping relation of the grate bars prevents, to a great degree, clogging. WVhen ashes have accumulated in the bottom of the fire-box, such ashes may be dumped readily by removing the lowest grate bar, this being accomplished by removing the keys or pins 13 and let which hold this bar in place at its ends. Owing to the arrangement of the grate bars and the provision for the feeding of air through and between them to the burning fuel, the temperature of the bars is kept relatively low, thus preventing overheating and consequently bending or destruction of the bars. A water-cooled grate bar 15 is preferably placed above the highest rate bar to support the super-structure o the fire-box and to prevent burning of the super wall by the cooling water circulating therethrough.

I claim as my invention 1. A grate for furnaces embodying a series of horizontal relatively fixed grate bars spaced in an inclined direction and also spaced vertically, said grate bars being substantially solid and having at their inner ends overlapping downwardly sloping surfaces and having air-feeding holes leading to said downwardly sloping surfaces.

2. A grate for furnaces embodying a series of relatively fixed grate bars spaced in an inclined direction and having at their upper inner ends overlapping downwardly sloping'surfaces, each bar-being solid and having a longitudinal row of air-feeding holes leading from the under side to the downwardly sloping surface on the upper side thereof.

3. A grate for furnaces embodying a series of grate bars spaced apart in an inclined direction and having overlapping downwardly sloping surfaces at their inner edges and provided with air-feeding holes extending from the bottoms to the sloping surfaces on the tops thereof.

41:. The combination of a furnace having nesses.

THOMAS M. KEKIGH.

Witnesses: V EMIL A. KEKIOI-I, MARKS TORNIGH.

Copies of. this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0, 

